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【判断题】
我国畜牧业结构调整的重点是大力发展畜禽新品种。()A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】With more and more farmers moving to cities, an inadequate labor force is becoming a major factor affecting the country's grain output.
A.
automatically
B.
occasionally
C.
absolutely
D.
gradually
【单选题】It can be inferred from the passage that which of the following has been a factor influencing the extent to which research on mycorrhizal fungi has progressed?
A.
lack of funding for such research
B.
lack of immediate application of such research
C.
difficulties surrounding laboratory production of specimens for study.
D.
lack of a method for identifying mycorrhizal fungi
【单选题】I can't say which type of tea tastes better. It's just a (an) _____ of personal preference. [ ]
A.
affair
B.
problem
C.
variety
D.
matter
【单选题】Which of the following can be external negative factor?
A.
Toxic mental state
B.
Lack of vigilance
C.
Negative friends
D.
Adoption of friend's thought
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